- #1
Quinton Powell
- 3
- 0
What size propeller is required to lift a 180 lb person 30ft into the air consistently? Also, how powerful would the motor have to be to lift itself, the propeller, and person?
In summary, the required size of propeller to consistently lift a 180 lb person 30ft into the air would depend on the air density and the induced velocity needed for lift. The power needed for the motor would also depend on the weight of the helicopter and the rotor diameter. A static thrust calculator can be used to determine the appropriate size of propellers and motors for this theoretical question. According to the mechanics of helicopter flight, a small helicopter with a 700 kg mass and a rotor diameter of 7 m would require 60 kW or 80 hp of power.
- #2
paisiello2
- 907
- 88
Are you trying to build something like this:
- #3
Quinton Powell
- 3
- 0
Not quite. I am looking for a 2 bladed prop. This is a theoretical question at this stage.
- #4
paisiello2
- 907
- 88
I think you can google "static thrust calculator" and find what size of propellers and motors are available.
- #5
NTW
- 302
- 28
From the Wikipedia page on mechanics of helicopter flight:
For stationary flight, out of ground effect, and for a helicopter weight F
where
is the air density.
The induced velocity needed for lift will be:
and the power (called induced power) :
.
For example, in the case of a small helicopter of 700 kg mass and a rotor diameter of 7 m:
= 60 kW = 80 hp
.
For stationary flight, out of ground effect, and for a helicopter weight F
The induced velocity needed for lift will be:
and the power (called induced power) :
For example, in the case of a small helicopter of 700 kg mass and a rotor diameter of 7 m:
= 60 kW = 80 hp
.
1. How much effort does it take to lift a human being?
The amount of effort required to lift a human being depends on several factors, including the weight of the person, their body composition, and the strength of the person doing the lifting. On average, it takes around 20-25% of a person's body weight to lift them, but this can vary greatly.
2. Is it easier to lift a lighter or heavier human being?
Generally, it is easier to lift a lighter human being. This is because the weight of the person is the main factor in how much effort is required to lift them. A lighter person will require less effort to lift than a heavier person.
3. How does the body composition of a human being affect the effort required to lift them?
The body composition of a human being, specifically their muscle mass, can greatly affect the effort required to lift them. People with a higher muscle mass will be heavier, but also easier to lift due to their muscle strength. On the other hand, people with a lower muscle mass may be lighter, but require more effort to lift due to their lack of muscle strength.
4. Can a person's age and physical condition affect the effort required to lift them?
Yes, a person's age and physical condition can greatly affect the effort required to lift them. Older individuals and those with physical limitations may require more effort to lift due to decreased muscle strength and mobility.
5. Is there a specific technique for lifting a human being with less effort?
Yes, there are specific techniques for lifting a human being with less effort, such as using proper body mechanics and utilizing the assistance of other muscles and body parts. It is important to lift with your legs and not your back, and to use the help of your core muscles and arms to distribute the weight evenly.
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